QTads is a cross-platform multimedia interpreter for Tads (Text Adventure Development System) games. Both Tads versions in use today (Tads 2 and Tads 3) are supported. It should be easy to port to a range of platforms, including embedded devices. MIDI, Ogg Vorbis, MP3, and WAV sound formats are supported.

TripleA is a clone of the popular board game "Axis & Allies", which is a turn based strategy wargame. TripleA also acts as a game engine allowing creation of custom games with similar mechanics to Axis and Allies. It supports online play, network play, play-by-email, and single player vs AI or hot-seat. It comes with 11 different maps and the option to download more from online repositories. Most games take place during World War II, though there are mods to play other conflicts like the Napoleonic wars, or Lord of the Rings.

FrobTADS is a complete rewrite of the Unix
console-version of TADS ("Text Adventure
Development System"). It uses curses (or ncurses)
and provides an interpreter to play games
developed with TADS as well as the TADS 2 and 3
development tools. It adds support for a number of
relatively recent user interface features
including full support for text and background
colors, TADS 3 banner windows, and timed input.
It's also much more portable and more easily
maintainable, as it's built to modern Unix standards.

The OHRRPGCE (RPG Construction Engine) is a tool
for making your own retro 2D RPG games, in a style
similar to RPGs like the older Final Fantasy games
for the NES, SNES, or GBA. It includes, as an
example game, Fenrir-Lunaris's pixel-art
masterpiece "Vikings of Midgard".

The Gamebook Engine is a cross-platform engine for
writing gamebooks, such as the "Choose Your Own
Adventure" series or the "Lone Wolf" series. TGE
can interpret scripts that use the "Hyena"
gamebook format.

GMP is a fast, free, JavaScript game engine. It's small, simple, and easy to learn and use. GMP is great for making sprite-based, 2D games, and it can easily power most retro-style arcade game designs. It is also well suited to making puzzles such as sudoku or gogopop. Professional game developers will find GMP useful for making rapid prototypes during their game development cycle. Setup is quick, and changes can be viewed by anyone with a browser. Game hobbyists will find GMP easy to learn and hack. It's simple enough to use as a learning tool, and powerful enough to run the back-end of production-quality games. Games can be shared simply by putting them in a Web page.

The Brick Engine is a fast and simple lo-fi gaming engine. The engine provides a comprehensive API, including dazzling visual features, song playback, and collision detection: everything you need to make games with quickness and ease. The engine provides a straightforward C API and has language bindings for Tcl and Pascal, with support for more languages on the way.

TextureBuilder is a program to simplify the task of building several texture formats from six skybox images. The six different images represent the front, back, left, right, top, and bottom sides of a cube. They are combined to either a cross texture with the horizontal part up, a cross texture with the horizontal part down, a sideways cross texture, or a texture set including script files for the Torque 3D game engine.

AzureGE is a multi-platform OpenGL and OpenAL-based game engine. It has built-in support for I/O, threading, and networking, a particle system, a material generator, a texture generator, and a mesh/terrain generator. It is intended mainly for creating role playing games, but can also be used for other types of game.